Pigs and goats likely catch it too. It's been found in humans' noses in the Southwest — and in the air at airports and at chicken farms in Malaysia.

In response to our series on spillover viruses, you had many questions: from the role of climate change to possible benefits. We turn the mic to you for a special edition of 'Hidden Viruses.'

What's the risk of contracting a surprising virus from Fido or Kitty? It's not a frivolous question, as one virologist explains. And there's another question: Can you give a virus to your pet?

Since the pandemic was declared in 2020, many perhaps unfamiliar terms have become part of daily conversation. Here's a glossary, from antibodies to zoonosis.

New research points to a surprising way to stop spillovers of Hendra virus, which is harbored by bats. It's not often that it jumps to horses, then humans, but when it does, the result are brutal.

Mounting COVID-19 travel restrictions are meant to contain the Indian variant. But citizens and visitors alike are feeling frustrated.